Carers rights

Hi everyone
I would appreciate any help
I work for private employer who doesn’t want to take vaccine
I Had covid last month and I work as a carer since I recovered
He forbids me to go out of apartment at all, in my free time I can only stay in apartment and I live in his house. So I worked six months in Portsmouth without going to garden at all. I didn’t sign any contract and he is paid for his care by NHS
I’m not allowed to go to buy Food or to go for a walk or outside and when I got to take post one meter out of building I have to cover with protective suit
Is that legal now in May 2021

Please help and tell me if this is legal because I will go crazy, last week he tested me 7 times

This is a forum for unpaid family carers.